Fair Value Measurements Fair Value Measurements Narrative (Details) (USD $) In Millions, unless otherwise specified	Nov. 02, 2014	Aug. 03, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents, at Carrying Value	$ 38	$ 46
Long-term Debt	2,255	2,544
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	38	46
Long-term Debt, Fair Value	$ 2,335	$ 2,647